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excellent enterprises in chinas machinery industry
the most influential enterprise in henan industry
the most potential suppliers of cooperation
excellent enterprise award in export trade
most influential brand
most innovative company4
national award for science and technology progress
china coal industry science and technology progress award
certificate of quality management system
certificate of environmental management system
certificate of occupation health management system
safety certification of approval for mining products
patent of a non ferrous metallurgical furnace with variable diameter
patent of a sand mold for air induced heat conduction for casting
patent of low voltage variable frequency energy feedback braking device for motor drive circuit
patent of welding heating and heat preservation tooling for slip ring of sliding shoe mill
patent certificate of nylon ground rolling and preparation method
friction liner testing machine patent certificate
patent certificate of preparation method of friction liner
patent certificate for preparation of high wear resistance sheave liner